package cn;
import java.io.*;
import java.util.ArrayList;
import java.util.Collections;

/**
 * @author labvi
 * @version 1.0.0
 */
public class Main {
    private static final int MAX_NUM = 10000001;
    private static byte[] readIntArray() throws IOException {
        byte[] array = new byte[MAX_NUM];
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        String tmp;
        while ((tmp = in.readLine()) != null ){
            int i = Integer.parseInt(tmp);
            if (i == -1) {
                break;
            }
            array[i] = 1;
        }
        return array;
    }
    public static void main(String[] args) {

    }
}